WO2016124021A1 - 用于粉尘环境的激振装置密封静盘、动盘及迷宫密封装置 - Google Patents

用于粉尘环境的激振装置密封静盘、动盘及迷宫密封装置 Download PDF

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WO2016124021A1
WO2016124021A1 PCT/CN2015/093995 CN2015093995W WO2016124021A1 WO 2016124021 A1 WO2016124021 A1 WO 2016124021A1 CN 2015093995 W CN2015093995 W CN 2015093995W WO 2016124021 A1 WO2016124021 A1 WO 2016124021A1
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WIPO (PCT)
Prior art keywords
sealing
bearing
static
plate
labyrinth
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PCT/CN2015/093995
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English (en)
French (fr)
Inventor
李刚
罗波
杨增旺
王成军
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江苏鹏飞集团股份有限公司
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Publication of WO2016124021A1 publication Critical patent/WO2016124021A1/zh

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16JPISTONS; CYLINDERS; SEALINGS
    • F16J15/00Sealings
    • F16J15/44Free-space packings
    • F16J15/447Labyrinth packings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16JPISTONS; CYLINDERS; SEALINGS
    • F16J15/00Sealings
    • F16J15/16Sealings between relatively-moving surfaces

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  • the invention relates to the technical field of dustproof sealing of a transmission system used in coal, mining, building materials and the like, in particular to an excitation device for a dust environment, a static plate, a moving plate and a labyrinth sealing device.
  • the labyrinth seal is often used for the seal of the shaft and the various stages of the large-scale equipment transmission system. It is arranged with a plurality of circumferentially arranged ring-shaped sealing teeth around the rotating shaft, and a series of tortuous gaps and expansion cavities are formed between the teeth and the teeth to achieve Sealing purpose; there is no solid contact friction between the sealing structures, no lubrication is required, and thermal expansion is allowed, which is suitable for high temperature, high pressure and high speed frequencies.
  • the labyrinth seal is mainly composed of a movable disc and a static disc. As shown in FIG. 1, the movable disc 101 and the transmission main shaft 102 are fixed, and rotate together with the main shaft 102, and the static disc 103 is connected with the static structure of the bearing housing.
  • the static disc 103 is relatively high speed running between the movable disc 101 and the main shaft 102; its working principle is to prevent most of the particle diameter from being larger than the labyrinth seal by using the right-angled zigzag narrow gap 104 formed between the movable disc 101 and the static disc 103.
  • the dust particles in the gap enter the labyrinth seal chamber, and even if a part of the dust enters the seal gap close to the outer side, since the labyrinth seal is a multi-ring tooth interlacing and lengthening path, the dust is difficult to enter the innermost end of the seal gap; and the two relative movements
  • the centrifugal force generated by the discs increases the resistance of the dust into the sealed chamber to some extent.
  • the labyrinth seal between the static plate 103 and the main shaft 102 is provided with a lip seal 105 or a dust seal. Used to prevent fine dust particles entering the labyrinth seal from entering the bearing, but due to the relatively high speed operation between the stationary plate and the main shaft, small particles of dust, especially dust deposited at right angles of the sealing gap, will still enter the lip seal and the main shaft.
  • the technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide an excitation device for a dust environment to seal a static disk, a movable disk, and an excitation device for the dust environment composed of the dynamic and static disks.
  • the labyrinth sealing device solves the problem of poor sealing effect of the excitation device on the vibrating screening device with various dust contents and reduces the equipment failure rate.
  • An excitation device for a dust environment seals a static disk, and a working annular end surface of the sealing static disk is provided with a trapezoidal convex annular tooth, and the convex annular tooth and the working end surface form at least one trapezoidal concave annular groove; the trapezoidal The apex angle is greater than 110° and less than 175°.
  • the inner ring edge of the bottom surface of the static disk is provided with a recessed step.
  • the outer side of the static disc is provided with a replenishing oil nozzle, and a replenishing oil hole is arranged inside the static disc, and the replenishing oil nozzle is connected to the inner end of the working end surface of the static disc through the supplementary oil hole.
  • An excitation device for a dust environment seals a moving plate, and a working end surface of the sealing moving plate is provided with a trapezoidal convex ring tooth, and the convex ring tooth and the working end face form at least one trapezoidal concave annular groove; the trapezoidal The apex angle is greater than 110° and less than 175°.
  • a labyrinth sealing device for a dust environment comprising a sealing static plate and a sealing moving plate, wherein the static plate is fixedly arranged on the bearing seat, wherein the matching end faces of the movable plate and the static plate form a zigzag labyrinth seal with a radial trapezoidal shape a gap; a lubricating oil nozzle is arranged on the bearing seat, and the lubricating oil nozzle sequentially connects the bearing and the inner end of the labyrinth sealing gap through the oil hole.
  • the lubricating oil nozzle communicates with the bearing through the lubricating oil hole, and the bearing communicates with the inner end of the gap of the labyrinth sealing structure through the bypass oil hole.
  • the working end faces of the sealing static disk and the sealing moving disk are provided with trapezoidal convex annular teeth, and the convex annular teeth and the working end surface thereof form at least one trapezoidal concave annular groove; the inner ring edge of the static disk bottom surface is provided with a circle of concave.
  • the step of the static plate is provided with a replenishing nozzle, and a replenishing oil hole is arranged inside the static plate, and the replenishing nozzle is connected to the inner end of the working end surface of the static plate through the supplementary oil hole.
  • the moving disc is sleeved on the journal of the drive shaft and is connected to the drive shaft by an interference connection.
  • the eccentric vibration excitation block and the shaft end cover are sequentially connected in the direction of the shaft end, and the eccentric vibration excitation block is connected with the transmission main shaft through a key, and the bolt is screwed on the transmission main shaft through the shaft end cover, and the eccentric vibration excitation block and the movable plate are connected.
  • the inner ring of the bearing is pressed tightly; the main shaft of the transmission is connected with the side plate of the screen frame through the main shaft sleeve and the bearing housing; the bearing is in the bearing housing, and the outer side of the bearing is pressed by the static plate, and the inner side of the bearing is provided with a retaining ring.
  • the apex angle of the trapezoid is greater than 110° and less than 175°
  • the axial gap of the labyrinth seal gap is 0.2 mm-0.4 mm
  • the radial gap is 1.4 mm-1.5 mm.
  • the working end faces of the movable plate and the stationary plate are galvanized.
  • the present invention has the following beneficial effects compared with the prior art: the labyrinth seal gap of the trapezoidal angle is used to replace the labyrinth seal gap of the previous right angle line, and the angle of repose of the dust particles is changed, and the centrifugal force is applied outward.
  • the combination of the two effects makes it difficult to accumulate and stay in the sealing gap; ensure that the grease continuously fills the labyrinth seal gap and is thrown under the centrifugal force, effectively preventing the dust particles from entering between the inner and outer rings of the bearing, and The incoming dust particles are taken out, and the lip seal and the dust seal are not needed.
  • the invention can effectively avoid the seal failure caused by the dust particles, prolong the service life of the bearing, and reduce the equipment failure rate.
  • FIG. 1 is a schematic view showing a labyrinth seal structure formed by a movable plate and a stationary plate on an excitation device in the prior art
  • FIG. 2 is a cross-sectional view showing a sealed static disk of an excitation device for a dust environment provided by the present invention
  • Figure 3 is a cross-sectional view showing the sealing device of the excitation device for a dust environment provided by the present invention
  • Figure 4 is a cross-sectional view showing the structure of a labyrinth seal device for a dust environment provided by the present invention
  • Figure 5 is an enlarged view of point B in Figure 4.
  • Figure 6 is a view taken along the line A in Figure 5 .
  • An excitation device for a dust environment seals a static disk, as shown in FIG. 2: a working annular end surface of the sealing static disk is provided with a trapezoidal convex ring tooth 201, and the convex annular tooth 201 and the working end surface form at least one trapezoidal shape a concave annular groove 202; a ring-shaped recessed step 203 is arranged on the inner ring edge of the bottom surface of the static disk; a replenishing oil nozzle 7 is arranged on the outer side of the static disk, and a supplementary oil hole 10 is arranged inside the static disk, and the supplementary oil nozzle 7 is connected to the supplementary oil hole 10 to The inner ring end of the working face of the stationary disk; the number of convex annular teeth on the static disk is more than one, the apex angle of the tooth 201 is greater than 110° and less than 175°, preferably between 120° and 140°; and the concave annular groove 202 The base angle is greater than 110° and less than
  • An excitation device for a dust environment seals the moving disc, as shown in FIG. 3: a working annular end surface of the sealing moving disc is provided with a trapezoidal convex ring tooth 201, and the convex annular tooth 201 and the working end surface form at least one trapezoidal shape
  • the above-mentioned sealed static disk and sealing moving disk are applied to a labyrinth sealing device for dust environment, as shown in FIG. 4, and in combination with FIG. 5: including a sealing static disk 9 and a sealing moving disk 11, the static disk 9 is mounted on the bearing On the seat 6, the transmission main shaft 13 is connected to the bearing housing 6 and the screen frame side plate 2 through the main shaft sleeve 1, the bearing 15 is installed in the bearing housing 6, and the static disc 9 is mounted on the bearing housing 6 by bolts, and the bearing is located outside the bearing 15 15 is pressed on the bearing housing 6; an O-ring 8 is arranged between the stationary plate 9 and the bearing housing 6; the bearing housing 6 is provided with a lubricating oil nozzle 4 and a lubricating oil hole 5, and the lubricating oil nozzle 4 is connected through the lubricating oil hole 5.
  • the bearing 15 is filled with grease for lubrication of the bearing 15; the inside of the bearing 15 is provided with a plastic retaining ring 3 for preventing grease side leak
  • the movable disc 11 is sleeved on the journal of the transmission main shaft 13 and has no gap with the journal interference connection.
  • the movable disc 11 is connected with the eccentric vibration excitation block 16 and the shaft in the direction of the transmission main shaft 13 .
  • the end cover 12, the eccentric vibration excitation block 16 is coupled to the transmission main shaft 1 via a key 14, and the bolt is screwed through the shaft end cover 12 to the transmission main shaft 13, and then the eccentric vibration excitation block 16 and the movable plate 11 and the bearing 15 are internally ring-pressed. tight.
  • the working end faces of the sealing plate and the sealing plate are provided with trapezoidal convex ring teeth 201, and the convex ring teeth 202 and the working end surface thereof form at least one trapezoidal concave ring groove.
  • a replenishing oil nozzle 7 is arranged on the outer side of the static plate, and a replenishing oil hole 10 is arranged inside the static plate, and the replenishing oil nozzle 7 is connected to the static plate through the supplementary oil hole 10
  • the inner end of the end surface; the annular tooth 201 and the annular groove 202 on the working end surface of the static disc respectively correspond to the concave ring groove 202 and the annular tooth 201 on the working end surface of the movable disc, and the teeth and the groove are alternately matched, and the mating end faces of the static disc and the movable disc are formed.
  • the invention changes the angle of repose of the dust by changing the meandering meandering gap of the sealing structure in the prior art, and changes the angle of repose of the dust, so that the incoming dust particles are difficult to accumulate, and the direction of the centrifugal force f forms a ⁇ / with the trapezoidal angle.
  • the angle of 3 ⁇ /4.5 increases the shearing effect of the centrifugal force on the deposited particles, making it difficult to form the accumulation, so that the particles in the sealing gap are centrifugally moved under the action of the centrifugal force f, which enhances the seal of the labyrinth seal.
  • the performance guarantees the sealing safety of the bearing; the angle of the trapezoidal angle ⁇ can be adjusted according to the environmental work with different dust content to ensure the sealing performance.
  • the inventors of the present invention have occasionally thought that the labyrinth seal gap 17 formed by the movable and stationary discs is filled with grease from the inner end, and the dust can be adhered to the grease by the viscosity of the grease during the rotation of the movable disc.
  • the labyrinth seal gap is thrown by the centrifugal force.
  • the present invention is provided with a bypass oil hole 18 between the bearing and the stationary plate, so that the grease of the bearing can enter the inner end of the labyrinth sealing gap 17, and then fill the sealing gap; the side in this embodiment
  • the oil hole 18 is formed such that the movable disk 11 is a sealed annular disk with a neck 19 having an inner diameter larger than the diameter of the moving plate neck, and between the inner wall 20 of the stationary disk and the outer wall of the moving plate neck 19.
  • the recessed step 203 forms an annular passage with the bearing; the loop channel communicates with the gap between the inner ring wall of the static disk and the outer wall of the moving plate neck, and the labyrinth seal gap is directly connected.
  • a bypass oil hole 18 is formed.
  • the invention can also directly connect the through hole of the static plate to the inner end of the labyrinth seal gap 17 to form the bypass oil hole at the step 18 of the static disk recess, or it can be other suitable arrangement.
  • the lubricating oil nozzle 4 can fill the gap between the inner and outer rings of the bearing and the labyrinth sealing gap 17 to prevent dust from entering, and as the bearing maintenance and maintenance of fresh grease is filled, the failed grease will overflow along the narrow gap of the trapezoidal labyrinth seal, and bring The dust particles that have entered the labyrinth seal effectively prevent these dust particles from entering between the inner and outer rings of the bearing, prolonging the service life of the bearing; and most or even all of the grease filled in the seal gap utilizes the in-bearing failure grease.
  • the cost of filling the grease is saved, and the grease for the bearing failure is provided.
  • the actual maintenance proves that the maintenance period of the bearing is extended from 2 to 3 weeks to 12 to 15 weeks.
  • the replenishing nozzle 7 is provided with a replenishing nozzle 7 and a replenishing oil hole 10, and the replenishing nozzle 7 is connected to the inner end of the labyrinth sealing gap 17 through the replenishing oil hole 10, and can quickly replenish the grease when the lubricating oil nozzle is not filled with the gap to ensure the sealing gap. Full, improve work efficiency.
  • the dust that has entered the gap can be directly blocked outside the bearing, further ensuring the sealing reliability.
  • the working end faces of the moving plate and the stationary plate are galvanized to increase the smoothness of the labyrinth sealing gap, which is advantageous for grease throwing.
  • the sealing effect between the moving disc and the static disc of the invention is good, and the interference connection between the moving disc and the journal has no gap, and there is no need to provide a lip seal or a dust seal between the static disc and the main shaft, thereby simplifying the sealing structure.
  • the equipment failure rate is greatly reduced, and the bearing life is greatly extended.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)

Abstract

一种用于粉尘环境的激振装置密封静盘(9)、密封动盘(11)以及迷宫密封装置,密封静盘和密封动盘的工作端面上均设有梯形的凸环形齿(201),凸环形齿与所属工作端面构成至少一个梯形的凹环形槽(202)。密封动盘和密封静盘的配合端面构成径向为梯形角的迷宫密封间隙。轴承座(6)上设有润滑油嘴(4),润滑油嘴通过润滑油孔(5)依次联通轴承(15)和所述迷宫密封间隙的内端。梯形角的迷宫密封间隙取代以往直角线的迷宫密封间隙,改变了粉尘颗粒的安息角,使其难以在密封间隙内堆积、滞留,能有效阻止粉尘颗粒进入轴承内外圈之间,并将进入的粉尘颗粒带出,无需唇型密封圈和防尘圈,延长轴承的使用寿命,降低设备故障率。

Description

用于粉尘环境的激振装置密封静盘、动盘及迷宫密封装置 技术领域
本发明涉及用于煤炭、矿山、建材等行业的传动系统的防尘密封技术领域,具体为一种用于粉尘环境的激振装置密封静盘、动盘及迷宫密封装置。
背景技术
迷宫密封常被用于大型装备传动系统轴和各级间的密封,其是在转轴周围设若干个依次排列的环行密封齿,齿与齿之间形成一系列曲折间隙与膨胀空腔,以达到密封目的;这种密封结构间无固体接触摩擦,毋须润滑,并允许有热膨胀,适应高温、高压、高转速频率的场合。
在现有的选煤选矿行业中,振动筛分设备被广泛应用,其激振系统的偏心激振装置被安装于传动主轴两端,随传动主轴一起转动,主轴的轴承处的密封结构主要采用上述迷宫密封方式,迷宫密封主要由动盘和静盘构成,如图1所示的,动盘101和传动主轴102固定,随主轴102一起转动,静盘103与轴承座静态结构连接在一起,静盘103与动盘101、主轴102之间相对高速运转;它的工作原理是利用动盘101和静盘103间构成的直角线型曲折狭窄间隙104,就可以阻止大部分粒径大于迷宫密封间隙的粉尘颗粒进入迷宫密封室内,并且即使一部分粉尘进入的靠近外侧的密封间隙内,由于迷宫密封为多环的齿交错配合加长路径,粉尘较难进入密封间隙最内端;并且相对运动的两个盘产生离心力,一定程度上增大了粉尘进入密封室的阻力。
由于选煤选矿等工作现场粉尘大,仍有小颗粒粉尘进入密封室内,并堆积在密封间隙的直角部位;迷宫密封的静盘103与主轴102之间配有唇形密封圈105或防尘圈,用其阻止进入迷宫密封的细小粉尘颗粒进入轴承,但由于静盘与主轴之间相对高速运转,小颗粒粉尘,尤其是堆积在密封间隙直角部位的粉尘,仍会进入唇形密封圈与主轴之间,并随着相对转动,极易造成唇形密封圈的磨损,这样唇形密封圈的失效使得粉尘颗粒进入轴承内外圈之间,造成轴承内外圈磨损并导致轴承最终失效,继而导致整个筛分设备无法 正常工作。
有鉴于此,特提出本发明。
发明内容
本发明要解决的技术问题在于克服现有技术的不足,提供一种用于粉尘环境的激振装置密封静盘、动盘以及由该动、静盘构成的用于粉尘环境的激振装置上的迷宫密封装置,以解决各种粉尘含量大的振动筛分设备上激振装置密封效果差的问题,减少设备故障率。
为解决上述技术问题,本发明采用技术方案的基本构思是:
一种用于粉尘环境的激振装置密封静盘,密封静盘的工作端面上设有梯形的凸环形齿,凸环形齿与所述工作端面构成至少一个梯形的凹环形槽;所述梯形的顶角大于110°且小于175°。
优选的,静盘底面的内环边缘设有一圈凹陷的台阶。
优选的,静盘的外侧设有补充油嘴,静盘内部设有补充油孔,补充油嘴通过补充油孔联通至静盘工作端面的内端。
一种用于粉尘环境的激振装置密封动盘,密封动盘的工作端面上设有梯形的凸环形齿,凸环形齿与所述工作端面构成至少一个梯形的凹环形槽;所述梯形的顶角大于110°且小于175°。
一种用于粉尘环境的迷宫密封装置,包括密封静盘和密封动盘,静盘固定设置在轴承座上,其特征在于:动盘和静盘的配合端面构成径向为梯形的曲折迷宫密封间隙;轴承座上设有润滑油嘴,润滑油嘴通过油孔依次联通轴承和所述迷宫密封间隙的内端。
优选的,所述润滑油嘴通过润滑油孔联通轴承,轴承通过旁路油孔联通至所述迷宫密封结构间隙的内端。
优选的,密封静盘和密封动盘的工作端面上均设有梯形的凸环形齿,凸环形齿与其所在工作端面构成至少一个梯形的凹环形槽;静盘底面的内环边缘设有一圈凹陷的台阶;静盘的外侧设有补充油嘴,静盘内部设有补充油孔,补充油嘴通过补充油孔联通至静盘工作端面的内端。
优选的,所述动盘套设在传动主轴的轴颈上并与传动主轴过盈连接,动 盘在轴端方向依次连接有偏心激振块与轴端盖,偏心激振块通过键与传动主轴连接,螺栓穿过轴端盖旋紧在传动主轴上,并将偏心激振块、动盘与轴承内圈压紧;传动主轴通过主轴套、轴承座与筛框侧板连接;轴承在轴承座内,轴承外侧通过静盘压紧,轴承内侧设有挡圈。
优选的,所述梯形的顶角大于110°且小于175°,所述迷宫密封间隙的轴向间隙为0.2mm-0.4mm,径向间隙为1.4mm-1.5mm。
优选的,动盘和静盘的工作端面表层镀锌。
采用上述技术方案后,本发明与现有技术相比具有以下有益效果:用梯形角的迷宫密封间隙取代以往直角线的迷宫密封间隙,改变了粉尘颗粒的安息角,加之其离心力作用下向外做离心运动,两种作用效果结合使其难以在密封间隙内堆积、滞留;保证润滑脂不断充满迷宫密封间隙、并在离心力作用下抛出,有效阻止粉尘颗粒进入轴承内外圈之间,并将进入的粉尘颗粒带出,无需唇型密封圈和防尘圈,本发明可有效避免粉尘颗粒造成的密封失效,延长轴承的使用寿命,降低设备故障率。
附图说明
图1是现有技术中激振装置上动盘与静盘构成的迷宫密封结构示意图;
图2是本发明提供的用于粉尘环境的激振装置密封静盘剖视图;
图3是本发明提供的用于粉尘环境的激振装置密封动盘剖视图;
图4是本发明提供的用于粉尘环境的迷宫密封装置结构剖视图;
图5为图4中的B点放大图;
图6为图5中的A向视图。
图中:101.现有技术动盘;102.现有技术主轴;103.现有技术静盘;104.现有技术迷宫密封间隙;105.唇型密封圈;201.凸环形齿;202.凹环形槽;203.台阶;1.主轴套;2.筛框侧板;3.塑料挡圈;4.润滑油嘴;5.润滑油孔;6.轴承座;7.补充油嘴;8.O型密封圈;9.静盘;10.补充油孔;11.动盘;12.轴端盖;13.传动主轴;14.键;15.轴承;16.偏心激振块;17.梯形角的迷宫密封间隙;18.旁路油孔;19.动盘颈部;20.静盘内环壁
具体实施方式
下面结合附图和具体实施例,对本发明作进一步说明,以助于理解本发明的内容。
一种用于粉尘环境的激振装置密封静盘,如图2所示:密封静盘的工作端面上设有梯形的凸环形齿201,凸环形齿201与所述工作端面构成至少一个梯形的凹环形槽202;静盘底面的内环边缘设有一圈凹陷的台阶203,静盘的外侧设有补充油嘴7,静盘内部设有补充油孔10,补充油嘴7通过补充油孔10联通至静盘工作端面的内环端;静盘上的凸环形齿数目1个以上,齿201的顶角大于110°且小于175°,优选为120°到140°之间;且凹环形槽202的底角大于110°且小于175°,优选为120°到140°之间。
一种用于粉尘环境的激振装置密封动盘,如图3所示:密封动盘的工作端面上设有梯形的凸环形齿201,凸环形齿201与所述工作端面构成至少一个梯形的凹环形槽202;动盘的凸环形齿数目1个以上,齿201的顶角大于110°且小于175°,优选为120°到140°之间;且凹环形槽202的底角大于110°且小于175°,优选为120°到140°之间。
上述的密封静盘与密封动盘应用于一种用于粉尘环境的迷宫密封装置,如图4所示,并结合图5:包括密封静盘9和密封动盘11,静盘9安装在轴承座6上,传动主轴13通过主轴套1与轴承座6和筛框侧板2连接,轴承15安装在轴承座6内,静盘9通过螺栓安装于轴承座6上,位于轴承15外侧将轴承15压紧在轴承座6上;静盘9与轴承座6之间设有O型密封圈8;轴承座6上设有润滑油嘴4和润滑油孔5,润滑油嘴4通过润滑油孔5联通轴承15,对轴承15加注润滑脂进行润滑;轴承15内侧设有防止润滑脂侧漏的塑料挡圈3。
如图4所示并结合图6:动盘11套设在传动主轴13的轴颈上与轴颈过盈连接无间隙,动盘11沿传动主轴13方向依次连接有偏心激振块16与轴端盖12,偏心激振块16通过键14与传动主轴1联接,螺栓穿过轴端盖12旋紧在传动主轴13上,继而将偏心激振块16与动盘11以及轴承15内圈压紧。
根据图5所示并结合图2、图3:密封静盘和密封动盘的工作端面上均设 有梯形的凸环形齿201,凸环形齿202与其所在工作端面构成至少一个梯形的凹环形槽202;静盘底面的内环边缘设有一圈凹陷的台阶203;静盘的外侧设有补充油嘴7,静盘内部设有补充油孔10,补充油嘴7通过补充油孔10联通至静盘工作端面的内端;静盘工作端面上的环形齿201、环形槽202分别对应动盘工作端面上的凹环槽202与环形齿201,齿、槽交错配合,静盘和动盘的配合端面构成径向为梯形角的曲折迷宫密封间隙17;梯形密封间隙17的梯形角β大于110°且小于175°,优选为120°到140°之间,优选为等腰梯形,这样可以使密封间隙均匀,消除压力差对密封性的影响;密封间隙的轴向间隙为0.2mm-0.4mm,径向间隙为1.4mm-1.5mm,可以阻挡粒径>0.2mm的粉尘。对于粒径<0.2的小颗粒粉尘,则是在动盘转动时,形成a=rω2的离心力场(其中a为离心力场加速度,r为动盘半径,ω为旋转角速度),进入迷宫密封间隙的粉尘颗粒则会产生离心力f=mrω2(m为粉尘颗粒质量),离心力f的作用下,粉尘进入密封间隙的阻力会大大增加。本发明通过将现有技术中密封结构的直角线曲折间隙改变成梯形角的曲折间隙,改变了粉尘的安息角,可以使进入的粉尘颗粒难以堆积,同时离心力f的方向与梯形角形成π/3~π/4.5角,加大了离心力对堆积颗粒的剪切作用,使其堆积难以形成,从而使密封间隙内的颗粒在离心力f的作用下向外做离心运动,增强了迷宫密封的密封性能,保证轴承的密封安全;梯形角β的角度可以根据在粉尘含量不同的环境作业做适应性调整,保证密封性能。
由于一些小颗粒粉尘仍难以自动清除,尤其在开停车时,离心力场不存在或者很小,而粉尘静压仍存在,所以仍旧使得一部分小颗粒粉尘进入密封间隙对密封结构和轴承造成威胁;
本发明的发明人偶然想到,在动、静盘构成的迷宫密封间隙17自内端填充润滑脂,可以在动盘旋转过程中,利用润滑脂的粘性将粉尘附着在油脂内,随着动盘的离心力作用下抛出迷宫密封间隙。
结合图5所示:故本发明在轴承与静盘之间设有旁路油孔18,使轴承的润滑脂能够进入迷宫密封间隙17内端,继而将密封间隙充满;本实施例中的旁路油孔18是这样形成的:动盘11为带颈19的密封圆环盘,静盘9的内径大于动盘颈部直径,则静盘内环壁20与动盘颈部19外壁之间留有缝隙,同 时静盘底面内环边缘的一圈凹陷的台阶203,凹陷的台阶203与轴承之间形成环形通道;环线通道联通静盘内环壁与动盘颈部外壁之间的缝隙直接通道迷宫密封间隙内端,形成旁路油孔18。本发明还可直接在静盘凹陷的台阶18部位设置贯穿静盘的通孔使其联通至迷宫密封间隙17内端,形成旁路油孔;也或者可以是其他适合的设置方式。
这样润滑油嘴4可以将轴承内外圈之间与迷宫密封间隙17充满,防止粉尘进入,并随着轴承保养维护新鲜润滑脂加注,失效的润滑脂将沿着梯形迷宫密封狭窄缝隙溢出,并带入已进入到迷宫密封中的粉尘颗粒,有效阻止这些粉尘颗粒进入轴承内外圈之间,延长轴承使用寿命;并且密封间隙内填充的润滑脂大部分甚至全部利用的是轴承内失效润滑脂,既节省了加注润滑脂的成本,又给轴承失效的润滑脂提供了一个排除通道;经实际验证,本发明将轴承的维修期由2~3周延长至12~15周以上。
静盘上设有补充油嘴7和补充油孔10,补充油嘴7通过补充油孔10联通至迷宫密封间隙17内端,能够在润滑油嘴对间隙填充不满时及时快速补充润滑脂,保证密封间隙的充满,提高工作效率。
自迷宫密封间隙内端充油,可以直接将间隙中已进入的粉尘阻挡在轴承之外,进一步保证密封可靠性。
动盘和静盘的工作端面镀锌,以增加迷宫密封间隙的光滑度,利于润滑脂抛出。
本发明动盘与静盘之间的密封效果良好,且动盘与轴颈之间过盈连接无间隙,无需在静盘与主轴之间设置唇形密封圈或者防尘圈,简化密封结构,大幅度减少了设备故障率,同时大大延长了轴承使用寿命。
以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。

Claims (10)

  1. 一种用于粉尘环境的激振装置密封静盘,其特征在于:密封静盘的工作端面上设有梯形的凸环形齿,凸环形齿与所述工作端面构成至少一个梯形的凹环形槽;所述梯形的顶角大于110°且小于175°。
  2. 根据权利要求1所述的用于粉尘环境的激振装置密封静盘,其特征在于:静盘底面的内环边缘设有一圈凹陷的台阶。
  3. 根据权利要求2所述的用于粉尘环境的激振装置密封静盘,其特征在于:静盘的外侧设有补充油嘴,静盘内部设有补充油孔,补充油嘴通过补充油孔联通至静盘工作端面的内端。
  4. 一种用于粉尘环境的激振装置密封动盘,其特征在于:密封动盘的工作端面上设有梯形的凸环形齿,凸环形齿与所述工作端面构成至少一个梯形的凹环形槽;所述梯形的顶角大于110°且小于175°。
  5. 一种用于粉尘环境的迷宫密封装置,包括密封静盘和密封动盘,静盘固定设置在轴承座上,其特征在于:动盘和静盘的配合端面构成径向为梯形角的迷宫密封间隙;轴承座上设有润滑油嘴,润滑油嘴通过油孔依次联通轴承和所述迷宫密封间隙的内端。
  6. 根据权利要求5所述的用于粉尘环境的迷宫密封装置,其特征在于:所述润滑油嘴通过润滑油孔联通轴承,轴承通过旁路油孔联通至所述迷宫密封间隙的内端。
  7. 根据权利要求5所述的用于粉尘环境的迷宫密封装置,其特征在于:密封静盘和密封动盘的工作端面上均设有梯形的凸环形齿,凸环形齿与其所在工作端面构成至少一个梯形的凹环形槽;静盘底面的内环边缘设有一圈凹陷的台阶;静盘的外侧设有补充油嘴,静盘内部设有补充油孔,补充油嘴通过补充油孔联通至静盘工作端面的内端。
  8. 根据权利要求5-7任一项所述的用于粉尘环境的迷宫密封装置,其特征在于:所述动盘套设在传动主轴的轴颈上并与传动主轴过盈连接,动盘在轴端方向依次连接有偏心激振块与轴端盖,偏心激振块通过键与传动主轴连接,螺栓穿过轴端盖旋紧在传动主轴上,并将偏心激振块、动盘与轴承内圈压紧;传动主轴通过主轴套、轴承座与筛框侧板连接;轴承在轴承座内,轴 承外侧通过静盘压紧,轴承内侧设有挡圈。
  9. 根据权利要求5-7任一项所述的用于粉尘环境的迷宫密封装置,其特征在于:所述梯形的顶角大于110°且小于175°,所述迷宫密封间隙的轴向间隙为0.2mm-0.4mm,径向间隙为1.4mm-1.5mm。
  10. 根据权利要求5-7任一项所述的用于粉尘环境的迷宫密封装置,其特征在于:动盘和静盘的工作端面表层镀锌。
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CN110486455A (zh) * 2019-09-12 2019-11-22 南京高精齿轮集团有限公司 一种减速机密封结构及减速机
CN110486455B (zh) * 2019-09-12 2024-04-23 南京高精齿轮集团有限公司 一种减速机密封结构及减速机
CN113738769A (zh) * 2021-08-24 2021-12-03 安徽华铂再生资源科技有限公司 一种激振器油封结构
CN113738769B (zh) * 2021-08-24 2023-01-03 安徽华铂再生资源科技有限公司 一种激振器油封结构

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